linux-kernel - [PATCH v2 35/45] mfd: max8907: Use devm_register_simple_power_off

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Message-Id: <20211027211715.12671-36-digetx@gmail.com>
Date:   Thu, 28 Oct 2021 00:17:05 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Lee Jones <lee.jones@...aro.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Mark Brown <broonie@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Russell King <linux@...linux.org.uk>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Ulf Hansson <ulf.hansson@...aro.org>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Guo Ren <guoren@...nel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Greg Ungerer <gerg@...ux-m68k.org>,
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Subject: [PATCH v2 35/45] mfd: max8907: Use devm_register_simple_power_off_handler()

Use devm_register_simple_power_off_handler() that replaces global
pm_power_off variable and allows to register multiple power-off handlers.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/mfd/max8907.c | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/drivers/mfd/max8907.c b/drivers/mfd/max8907.c
index 41f566e6a096..58699510311b 100644
--- a/drivers/mfd/max8907.c
+++ b/drivers/mfd/max8907.c
@@ -16,6 +16,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/reboot.h>
 #include <linux/regmap.h>
 #include <linux/slab.h>
 
@@ -174,9 +175,10 @@ static const struct regmap_irq_chip max8907_rtc_irq_chip = {
 	.num_irqs = ARRAY_SIZE(max8907_rtc_irqs),
 };
 
-static struct max8907 *max8907_pm_off;
-static void max8907_power_off(void)
+static void max8907_power_off(void *data)
 {
+	struct max8907 *max8907_pm_off = data;
+
 	regmap_update_bits(max8907_pm_off->regmap_gen, MAX8907_REG_RESET_CNFG,
 			MAX8907_MASK_POWER_OFF, MAX8907_MASK_POWER_OFF);
 }
@@ -214,6 +216,17 @@ static int max8907_i2c_probe(struct i2c_client *i2c,
 		goto err_regmap_gen;
 	}
 
+	if (pm_off) {
+		ret = devm_register_simple_power_off_handler(&i2c->dev,
+							     max8907_power_off,
+							     max8907);
+		if (ret) {
+			dev_err(&i2c->dev,
+				"failed to register power-off handler: %d\n", ret);
+			return ret;
+		}
+	}
+
 	max8907->i2c_rtc = i2c_new_dummy_device(i2c->adapter, MAX8907_RTC_I2C_ADDR);
 	if (IS_ERR(max8907->i2c_rtc)) {
 		ret = PTR_ERR(max8907->i2c_rtc);
@@ -260,11 +273,6 @@ static int max8907_i2c_probe(struct i2c_client *i2c,
 		goto err_add_devices;
 	}
 
-	if (pm_off && !pm_power_off) {
-		max8907_pm_off = max8907;
-		pm_power_off = max8907_power_off;
-	}
-
 	return 0;
 
 err_add_devices:
-- 
2.33.1